The apparatus comprises a polarization controller (FPC1) and a generator (DDG1) for generating a differential delay between two orthogonal polarization modes. The controller and the generator are interposed between the link fiber (LF) and the receiver terminal (RX). A servo-control unit (SCU1) measures the degree of polarization (PL) of the optical signal delivered by the differential delay generator, and it servo-controls the polarization controller (FPC1) in such a manner as to maximize the degree of polarization (PL). Application to long-haul optical transmission systems.
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August 17, 1998
January 15, 2002
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